A 12-year old Ridgefield boy with cancer has received a wish through a local Make-A-Wish granter.  The Ridgefield Press reports that Amy Nash arranged for a Christmas caroling flash mob to show up at the home of 12-year old Justin Cowen.  Hundreds of cars arrived at his home Tuesday evening for about half an hour of caroling.  Ridgefield Police and Fire Departments helped with traffic along New Road.  Some friends of the family also brought gifts for the boy.